CVE-2025-36755 is a vulnerability in the CleverDisplay BlueOne hardware player, specifically related to unsafe debug access levels exposed via the device's BIOS interface. The BlueOne device is designed with USB interfaces physically enclosed to prevent unauthorized access. However, researchers demonstrated that by physically removing or circumventing the protective enclosure, an attacker can connect a USB keyboard and press the ESC key during the device's boot process to enter the BIOS setup interface. Within this BIOS interface, settings can be viewed but not modified, meaning the attacker gains read-only access to internal system information. This exposure corresponds to CWE-1244 (Internal Asset Exposed to Unsafe Debug Access Level or State) and CWE-1191, indicating a design weakness in access control. The vulnerability does not allow attackers to alter BIOS settings, compromise device integrity, or disrupt availability under tested configurations. The CVSS 4.0 score of 2.4 reflects a low-severity issue due to the requirement for physical access, lack of modification capability, and no need for user interaction beyond physical tampering. No patches or firmware updates are currently available, and no exploits have been observed in the wild. The vulnerability slightly increases the attack surface by leaking internal system information, which could potentially aid in further targeted attacks if combined with other vulnerabilities or insider threats.

For European organizations, the primary impact of CVE-2025-36755 is the increased risk of information disclosure through physical tampering. While the vulnerability does not allow modification of BIOS settings or direct compromise of device integrity or availability, the ability to view BIOS configurations could provide attackers with valuable intelligence about device setup, firmware versions, or security configurations. This information could be leveraged in multi-stage attacks or to identify additional vulnerabilities. The requirement for physical access limits the threat to environments where devices are not adequately secured or monitored. Sectors with distributed hardware deployments in less controlled physical environments, such as retail digital signage, transportation hubs, or public venues, may be more vulnerable. The low CVSS score indicates that the overall risk is limited, but organizations should consider the cumulative risk in conjunction with other security controls. The exposure of internal assets could also have compliance implications under regulations like GDPR if combined with other data breaches.

To mitigate CVE-2025-36755, organizations should prioritize strengthening physical security controls around BlueOne hardware players. This includes securing device enclosures with tamper-evident seals, locks, or enclosures that are difficult to remove without detection. Regular physical inspections and monitoring for signs of tampering should be implemented, especially in publicly accessible or less supervised locations. Network segmentation and device monitoring can help detect anomalous behavior that might indicate physical compromise attempts. Organizations should engage with CleverDisplay B.V. to inquire about firmware updates or hardware revisions that could restrict BIOS access or disable debug interfaces when physical tampering is detected. Additionally, consider deploying endpoint detection solutions capable of alerting on unusual device states or boot sequences. Training staff to recognize and report physical security incidents is also recommended. Finally, maintaining an inventory of deployed devices and their physical locations will aid in rapid response if tampering is suspected.